#1 Curved Mirrors A concave mirror has a radius of 1.26 meters. What is the foca

Question

#1 Curved Mirrors A concave mirror has a radius of 1.26 meters. What is the focal length f? O A. 2.52 meters OB. 1.26 meters ° C. 0.630 meters O D. 0.320 meters #2 Curved Mirrors Parallel light rays strike the surface of a concave spherical mirror (neglect the effects of spher- ical aberration) in the direction of the main axis of the mirror. The light rays subsequently 0 A. converge at the focal length. for capacitors O B. diverge as though emitted from a point located a distance behind the mirror equal to the focal length. O C. are reflected and remain parallel. O D. converge at the center of the sphere. #3 Curved Mirrors For a concave mirror, an object with a distance o in excess of twice the foccal length from the surface of the mirror produces O A. an upright virtual smaller image O B. an real inverted smaller image O C. an upright magnified image O D. a real inverted magnified image

Explanation / Answer

1. We know, focal length = Radius of curvature/2

So, focal length of the concave mirror will be

f = R/2 = (1.26/2) = 0.630 m, option (c).

3. Object at a distance in excess of twice the focal length means object is situated outside the center of curvature of the concave mirror and for such an object a concave mirror always produces a real and inverted image which is smaller in size as compared to the object. So option (B).

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